Viewing archive of Wednesday, 11 March 2015
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2015 Mar 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 70 Issued at 2200Z on 11 Mar 2015IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a X2 event observed at
11/1622Z from Region 2297 (S16E14). There are currently 2 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(12 Mar, 13 Mar, 14 Mar).
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
458 km/s at 11/0446Z. Total IMF reached 11 nT at 11/0712Z. The maximum
southward component of Bz reached -9 nT at 11/0651Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 900 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (12 Mar), unsettled to minor
storm levels on day two (13 Mar) and unsettled to active levels on day
three (14 Mar). Protons have a slight chance of crossing threshold on
days one, two, and three (12 Mar, 13 Mar, 14 Mar).
III. Event Probabilities 12 Mar to 14 Mar
| Class M | 70% | 70% | 70% |
| Class X | 20% | 20% | 20% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Mar 132 Predicted 12 Mar-14 Mar 125/125/125 90 Day Mean 11 Mar 141
V. Geomagnetic A Indices
Observed Afr/Ap 10 Mar 004/005 Estimated Afr/Ap 11 Mar 008/009 Predicted Afr/Ap 12 Mar-14 Mar 013/018-021/030-015/018
VI. Geomagnetic Activity Probabilities 12 Mar to 14 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 40% | 30% |
| Minor storm | 10% | 25% | 05% |
| Major-severe storm | 01% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 15% |
| Minor storm | 30% | 25% | 30% |
| Major-severe storm | 45% | 60% | 35% |
All times in UTC
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